Alert archive / South Carolina / Mesoscale Discussions in 2018
Mesoscale Discussion 1505
The Storm Prediction Center issued this mesoscale discussion at Sep 27, 2018, 2:20 PM EDT for Columbia County, Richmond County, Georgia; 22 counties in North Carolina; 23 counties in South Carolina. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 27, 2018, 2:20 PM EDT (18:20 UTC)
- Expired
- Sep 27, 2018, 4:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
All 47 counties
Columbia County, GA, Richmond County, GA, Alamance County, NC, Anson County, NC, Cabarrus County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Durham County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Mecklenburg County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Wake County, NC, Aiken County, SC, Allendale County, SC, Bamberg County, SC, Barnwell County, SC, Calhoun County, SC, Chester County, SC, Chesterfield County, SC, Clarendon County, SC, Darlington County, SC, Dillon County, SC, Edgefield County, SC, Fairfield County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marlboro County, SC, Newberry County, SC, Orangeburg County, SC, Richland County, SC, Saluda County, SC, Sumter County, SC, York County, SC
The radar
The Columbia radar (KCAE), 105 km from the middle of the area, began a volume at 18:20 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 6.3 hours before the alert went out and 173 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 363 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 616 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 3:03 PM EDT | Mesoscale Discussion | SPC | Baker, Baldwin, Banks, Barrow, Bartow, Ben Hill and 93 more | 2 hr |
| Sep 27, 5:34 PM EDT | Mesoscale Discussion | SPC | Banks, Barrow, Clarke, Elbert, Franklin, Greene and 9 more | 116 min |
| Sep 27, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | Elbert, Franklin, Hart, Stephens | 4 hr |
| Sep 27, 5:47 PM EDT | Mesoscale Discussion | SPC | Alamance, Anson, Chatham, Cumberland, Durham, Franklin and 17 more | 88 min |
| Sep 27, 7:34 PM EDT | Mesoscale Discussion | SPC | Cleveland, Gaston, Polk, Rutherford | 56 min |
Nearby
Mesoscale Discussions in South Carolina, 2018Mesoscale Discussions in North Carolina, 2018Mesoscale Discussions in Georgia, 2018Every mesoscale discussion in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.